'use strict'

class content {

  constructor () {
    //param默认就是/:id，若要改变路由，则可以设置此属性，比如设置为/:name
    //this.param = '/:id'
  }

  __mid(){
    return[
      {
        name:'token-verify',
        path:['post','delete']
      }
    ]
  }

  //以下方法，若不需要，要去掉，避免无意义的路由。

  //获取资源具体内容
  //对应路由 GET /content/:id
  async get (c) {
    let id=c.param.id;

    let sqltext='SELECT id,detail,title,update_time'+' FROM content WHERE id=$1';

    let r=await c.service.psql.query(sqltext,[ id ]);

    if(r.rowCount===0){
        return c.status(404).send('not found')
    }
    c.send(r.rows[0])
  }

  //创建资源
  //对用路由 POST /content
  async post (c) {
    try{
      //c.body是提交的请求体数据
      let data=JSON.parse(c.body);
      let sqltext='INSERT INTO content'+'(id, detail, title, add_time, update_time)'+'VALUES($1, $2, $3, $4, $5)';

      //随机数转成16进制字符串并去掉前两位，字串作为ID
      let id=Math.random().toString(16).substring(2);
      let tm=Date.now();

      let r=await c.service.psql.query(sqltext,[
          id, data.detail, data.title, tm, tm
      ])

      if(r.rowCount==0){
          return c.status(500).send('failed')
      }

      c.send(id)
  }catch(err){
      console.error(err);
      c.status(400).send('bad data');
  }
  }

  //更新资源
  //对应路由 PUT /content/:id
  async put (c) {

  }

  //获取列表
  //对应路由GET /conetnt
  async list (c) {
    let sqltext='SELECT id,title,update_time FROM content'
    let r=await c.service.psql.query(sqltext);

    c.send(r.rows)
  }

  //删除资源
  //对应路由 DELETE /content/:id
  async delete (c) {
    let r=await c.service.psql.query('DELETE FROM content WHERE id=$1', [ c.param.id ])
    c.send({count:r.rowCount})
  }

}

module.exports = content
